Computer Drive Installation Instructions

6 NC Machine Data (NC MD), NC Setting Data (NC SD) 04.96
6.6.1 General MD bits (general bits)
7 6 5 4 3 2 1 0
Bit No.
NC MD
5020
Emergency
retraction
off (as from
SW4.7
SW 5.2)
Default value: 0
Bit 2 Bit 2 = 1 Emergency retraction off (G420) for all channels
Meaning:
Monitoring of the ER sources, specified via MD, OFF for:
- the channel where the part program is executed
- all axes of the mode group for ALL channels incl. PLC
- all spindles of the mode group for ALL channels incl. PLC
G420 X S1 =
Meaning:
Monitoring of the ER sources, specified via MD, OFF for:
- the X axis for ALL channels incl. PLC
- the spindle S1 for ALL channels incl. PLC
”G420/G421” from PLC:
Axis-specific: DB29 DR K+ 2.5 DL K+ 2.5
Spindle-specific: DB29 DR K+ 26.5 DL K+ 26.5
Monitoring for axes (FA/FS) can also be switched on/off from PLC. If
monitoring is switched off from PLC, it is switched off for all channels.
Bit 2 = 0 Emergency retraction off (G420) in current channel
7 6 5 4 3 2 1 0
Bit No.
NC MD
5021
Neutral
position of
outputs for
mode group
6
1)
Neutral
position of
outputs for
mode group
5
1)
Neutral
position of
outputs for
mode group
4
1)
Neutral
position of
outputs for
mode group
3
1)
Neutral
position of
outputs for
mode group
2
1)
Neutral
position of
outputs for
mode group
1
1)
Neutral position of mixed I/O outputs bit 5 to 0
Bit 5-0=1 After Mode Group Reset the output byte of the mixed I/O module is at high
level (24 V).
Bit 5-0=0 After Mode Group Reset the output byte of the mixed I/O module is at low
level (0 V).
Active: On Power On
_______
1) As from SW 4
6–104 © Siemens AG 1992 All Rights Reserved 6FC5197- AA50
SINUMERIK 840C (IA)